Merge pull request #70 from raziraz/master

Edited links for header and footer.
Working on multi-language support
Working on multi-language support
Removing image files
Working on multi-language support
Working on multi-language support
Bug fixes
Update texts.php

Well, I didn't translate everything, but most of it, and I guess a few could be better.

I was wondering what polite form of address invoice ninja is aiming at?
And also if you'd rather like to use "Kredit" than "Gutschrift" for credit.
Merge pull request #71 from seamofreality/patch-1

Update texts.php
Bug fixes
Merge branch 'master' of github.com:hillelcoren/invoice-ninja
Adding language file
Working on pro plan
Working on pro plan
Adding ability to remove ninja logo
Dutch translation added + fix in english translation
Minor update
Merge pull request #73 from chrisderouck/master

Dutch translation + english fix
Bug fixes
Bug fixes